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linux-next/drivers/s390/net/qeth_core_sys.c
Julian Wiedmann a8c7629c62 s390/qeth: remove OSN support
Commit fb64de1bc3 ("s390/qeth: phase out OSN support") spelled out
why the OSN support in qeth is in a bad shape, and put any remaining
interested parties on notice to speak up before it gets ripped out.

It's 2021 now, so make true on that promise and remove all the
OSN-specific parts from qeth. This also means that we no longer need to
export various parts of the cmd & data path internals to the L2 driver.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-20 06:17:06 -07:00

680 lines
17 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright IBM Corp. 2007
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
* Frank Pavlic <fpavlic@de.ibm.com>,
* Thomas Spatzier <tspat@de.ibm.com>,
* Frank Blaschka <frank.blaschka@de.ibm.com>
*/
#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/list.h>
#include <linux/rwsem.h>
#include <asm/ebcdic.h>
#include "qeth_core.h"
static ssize_t qeth_dev_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
switch (card->state) {
case CARD_STATE_DOWN:
return sprintf(buf, "DOWN\n");
case CARD_STATE_SOFTSETUP:
if (card->dev->flags & IFF_UP)
return sprintf(buf, "UP (LAN %s)\n",
netif_carrier_ok(card->dev) ? "ONLINE" :
"OFFLINE");
return sprintf(buf, "SOFTSETUP\n");
default:
return sprintf(buf, "UNKNOWN\n");
}
}
static DEVICE_ATTR(state, 0444, qeth_dev_state_show, NULL);
static ssize_t qeth_dev_chpid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%02X\n", card->info.chpid);
}
static DEVICE_ATTR(chpid, 0444, qeth_dev_chpid_show, NULL);
static ssize_t qeth_dev_if_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", netdev_name(card->dev));
}
static DEVICE_ATTR(if_name, 0444, qeth_dev_if_name_show, NULL);
static ssize_t qeth_dev_card_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", qeth_get_cardname_short(card));
}
static DEVICE_ATTR(card_type, 0444, qeth_dev_card_type_show, NULL);
static const char *qeth_get_bufsize_str(struct qeth_card *card)
{
if (card->qdio.in_buf_size == 16384)
return "16k";
else if (card->qdio.in_buf_size == 24576)
return "24k";
else if (card->qdio.in_buf_size == 32768)
return "32k";
else if (card->qdio.in_buf_size == 40960)
return "40k";
else
return "64k";
}
static ssize_t qeth_dev_inbuf_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", qeth_get_bufsize_str(card));
}
static DEVICE_ATTR(inbuf_size, 0444, qeth_dev_inbuf_size_show, NULL);
static ssize_t qeth_dev_portno_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->dev->dev_port);
}
static ssize_t qeth_dev_portno_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
unsigned int portno, limit;
int rc = 0;
rc = kstrtouint(buf, 16, &portno);
if (rc)
return rc;
if (portno > QETH_MAX_PORTNO)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
limit = (card->ssqd.pcnt ? card->ssqd.pcnt - 1 : card->ssqd.pcnt);
if (portno > limit) {
rc = -EINVAL;
goto out;
}
card->dev->dev_port = portno;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(portno, 0644, qeth_dev_portno_show, qeth_dev_portno_store);
static ssize_t qeth_dev_portname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "no portname required\n");
}
static ssize_t qeth_dev_portname_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
dev_warn_once(&card->gdev->dev,
"portname is deprecated and is ignored\n");
return count;
}
static DEVICE_ATTR(portname, 0644, qeth_dev_portname_show,
qeth_dev_portname_store);
static ssize_t qeth_dev_prioqing_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
switch (card->qdio.do_prio_queueing) {
case QETH_PRIO_Q_ING_PREC:
return sprintf(buf, "%s\n", "by precedence");
case QETH_PRIO_Q_ING_TOS:
return sprintf(buf, "%s\n", "by type of service");
case QETH_PRIO_Q_ING_SKB:
return sprintf(buf, "%s\n", "by skb-priority");
case QETH_PRIO_Q_ING_VLAN:
return sprintf(buf, "%s\n", "by VLAN headers");
case QETH_PRIO_Q_ING_FIXED:
return sprintf(buf, "always queue %i\n",
card->qdio.default_out_queue);
default:
return sprintf(buf, "disabled\n");
}
}
static ssize_t qeth_dev_prioqing_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
int rc = 0;
if (IS_IQD(card) || IS_VM_NIC(card))
return -EOPNOTSUPP;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
/* check if 1920 devices are supported ,
* if though we have to permit priority queueing
*/
if (card->qdio.no_out_queues == 1) {
card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
rc = -EPERM;
goto out;
}
if (sysfs_streq(buf, "prio_queueing_prec")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_PREC;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_skb")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_SKB;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_tos")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_TOS;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_vlan")) {
if (IS_LAYER3(card)) {
rc = -EOPNOTSUPP;
goto out;
}
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_VLAN;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "no_prio_queueing:0")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_FIXED;
card->qdio.default_out_queue = 0;
} else if (sysfs_streq(buf, "no_prio_queueing:1")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_FIXED;
card->qdio.default_out_queue = 1;
} else if (sysfs_streq(buf, "no_prio_queueing:2")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_FIXED;
card->qdio.default_out_queue = 2;
} else if (sysfs_streq(buf, "no_prio_queueing:3")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_FIXED;
card->qdio.default_out_queue = 3;
} else if (sysfs_streq(buf, "no_prio_queueing")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(priority_queueing, 0644, qeth_dev_prioqing_show,
qeth_dev_prioqing_store);
static ssize_t qeth_dev_bufcnt_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->qdio.in_buf_pool.buf_count);
}
static ssize_t qeth_dev_bufcnt_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
unsigned int cnt;
int rc = 0;
rc = kstrtouint(buf, 10, &cnt);
if (rc)
return rc;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
cnt = clamp(cnt, QETH_IN_BUF_COUNT_MIN, QETH_IN_BUF_COUNT_MAX);
rc = qeth_resize_buffer_pool(card, cnt);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(buffer_count, 0644, qeth_dev_bufcnt_show,
qeth_dev_bufcnt_store);
static ssize_t qeth_dev_recover_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
bool reset;
int rc;
rc = kstrtobool(buf, &reset);
if (rc)
return rc;
if (!qeth_card_hw_is_reachable(card))
return -EPERM;
if (reset)
rc = qeth_schedule_recovery(card);
return rc ? rc : count;
}
static DEVICE_ATTR(recover, 0200, NULL, qeth_dev_recover_store);
static ssize_t qeth_dev_performance_stats_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "1\n");
}
static ssize_t qeth_dev_performance_stats_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct qeth_qdio_out_q *queue;
unsigned int i;
bool reset;
int rc;
rc = kstrtobool(buf, &reset);
if (rc)
return rc;
if (reset) {
memset(&card->stats, 0, sizeof(card->stats));
for (i = 0; i < card->qdio.no_out_queues; i++) {
queue = card->qdio.out_qs[i];
if (!queue)
break;
memset(&queue->stats, 0, sizeof(queue->stats));
}
}
return count;
}
static DEVICE_ATTR(performance_stats, 0644, qeth_dev_performance_stats_show,
qeth_dev_performance_stats_store);
static ssize_t qeth_dev_layer2_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->options.layer);
}
static ssize_t qeth_dev_layer2_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct net_device *ndev;
enum qeth_discipline_id newdis;
unsigned int input;
int rc;
rc = kstrtouint(buf, 16, &input);
if (rc)
return rc;
switch (input) {
case 0:
newdis = QETH_DISCIPLINE_LAYER3;
break;
case 1:
newdis = QETH_DISCIPLINE_LAYER2;
break;
default:
return -EINVAL;
}
mutex_lock(&card->discipline_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
if (card->options.layer == newdis)
goto out;
if (card->info.layer_enforced) {
/* fixed layer, can't switch */
rc = -EOPNOTSUPP;
goto out;
}
if (card->discipline) {
/* start with a new, pristine netdevice: */
ndev = qeth_clone_netdev(card->dev);
if (!ndev) {
rc = -ENOMEM;
goto out;
}
qeth_remove_discipline(card);
free_netdev(card->dev);
card->dev = ndev;
}
rc = qeth_setup_discipline(card, newdis);
out:
mutex_unlock(&card->discipline_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(layer2, 0644, qeth_dev_layer2_show,
qeth_dev_layer2_store);
#define ATTR_QETH_ISOLATION_NONE ("none")
#define ATTR_QETH_ISOLATION_FWD ("forward")
#define ATTR_QETH_ISOLATION_DROP ("drop")
static ssize_t qeth_dev_isolation_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
switch (card->options.isolation) {
case ISOLATION_MODE_NONE:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_NONE);
case ISOLATION_MODE_FWD:
return snprintf(buf, 9, "%s\n", ATTR_QETH_ISOLATION_FWD);
case ISOLATION_MODE_DROP:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_DROP);
default:
return snprintf(buf, 5, "%s\n", "N/A");
}
}
static ssize_t qeth_dev_isolation_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
enum qeth_ipa_isolation_modes isolation;
int rc = 0;
mutex_lock(&card->conf_mutex);
if (!IS_OSD(card) && !IS_OSX(card)) {
rc = -EOPNOTSUPP;
dev_err(&card->gdev->dev, "Adapter does not "
"support QDIO data connection isolation\n");
goto out;
}
/* parse input into isolation mode */
if (sysfs_streq(buf, ATTR_QETH_ISOLATION_NONE)) {
isolation = ISOLATION_MODE_NONE;
} else if (sysfs_streq(buf, ATTR_QETH_ISOLATION_FWD)) {
isolation = ISOLATION_MODE_FWD;
} else if (sysfs_streq(buf, ATTR_QETH_ISOLATION_DROP)) {
isolation = ISOLATION_MODE_DROP;
} else {
rc = -EINVAL;
goto out;
}
if (qeth_card_hw_is_reachable(card))
rc = qeth_setadpparms_set_access_ctrl(card, isolation);
if (!rc)
WRITE_ONCE(card->options.isolation, isolation);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
qeth_dev_isolation_store);
static ssize_t qeth_dev_switch_attrs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct qeth_switch_info sw_info;
int rc = 0;
if (!qeth_card_hw_is_reachable(card))
return sprintf(buf, "n/a\n");
rc = qeth_query_switch_attributes(card, &sw_info);
if (rc)
return rc;
if (!sw_info.capabilities)
rc = sprintf(buf, "unknown");
if (sw_info.capabilities & QETH_SWITCH_FORW_802_1)
rc = sprintf(buf, (sw_info.settings & QETH_SWITCH_FORW_802_1 ?
"[802.1]" : "802.1"));
if (sw_info.capabilities & QETH_SWITCH_FORW_REFL_RELAY)
rc += sprintf(buf + rc,
(sw_info.settings & QETH_SWITCH_FORW_REFL_RELAY ?
" [rr]" : " rr"));
rc += sprintf(buf + rc, "\n");
return rc;
}
static DEVICE_ATTR(switch_attrs, 0444,
qeth_dev_switch_attrs_show, NULL);
static ssize_t qeth_hw_trap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (card->info.hwtrap)
return snprintf(buf, 5, "arm\n");
else
return snprintf(buf, 8, "disarm\n");
}
static ssize_t qeth_hw_trap_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
int rc = 0;
int state = 0;
mutex_lock(&card->conf_mutex);
if (qeth_card_hw_is_reachable(card))
state = 1;
if (sysfs_streq(buf, "arm") && !card->info.hwtrap) {
if (state) {
if (qeth_is_diagass_supported(card,
QETH_DIAGS_CMD_TRAP)) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM);
if (!rc)
card->info.hwtrap = 1;
} else
rc = -EINVAL;
} else
card->info.hwtrap = 1;
} else if (sysfs_streq(buf, "disarm") && card->info.hwtrap) {
if (state) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
if (!rc)
card->info.hwtrap = 0;
} else
card->info.hwtrap = 0;
} else if (sysfs_streq(buf, "trap") && state && card->info.hwtrap)
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_CAPTURE);
else
rc = -EINVAL;
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(hw_trap, 0644, qeth_hw_trap_show,
qeth_hw_trap_store);
static ssize_t qeth_dev_blkt_store(struct qeth_card *card,
const char *buf, size_t count, int *value, int max_value)
{
unsigned int input;
int rc;
rc = kstrtouint(buf, 10, &input);
if (rc)
return rc;
if (input > max_value)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN)
rc = -EPERM;
else
*value = input;
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static ssize_t qeth_dev_blkt_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->info.blkt.time_total);
}
static ssize_t qeth_dev_blkt_total_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.time_total, 5000);
}
static DEVICE_ATTR(total, 0644, qeth_dev_blkt_total_show,
qeth_dev_blkt_total_store);
static ssize_t qeth_dev_blkt_inter_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->info.blkt.inter_packet);
}
static ssize_t qeth_dev_blkt_inter_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet, 1000);
}
static DEVICE_ATTR(inter, 0644, qeth_dev_blkt_inter_show,
qeth_dev_blkt_inter_store);
static ssize_t qeth_dev_blkt_inter_jumbo_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return sprintf(buf, "%i\n", card->info.blkt.inter_packet_jumbo);
}
static ssize_t qeth_dev_blkt_inter_jumbo_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet_jumbo, 1000);
}
static DEVICE_ATTR(inter_jumbo, 0644, qeth_dev_blkt_inter_jumbo_show,
qeth_dev_blkt_inter_jumbo_store);
static struct attribute *qeth_blkt_device_attrs[] = {
&dev_attr_total.attr,
&dev_attr_inter.attr,
&dev_attr_inter_jumbo.attr,
NULL,
};
static const struct attribute_group qeth_dev_blkt_group = {
.name = "blkt",
.attrs = qeth_blkt_device_attrs,
};
static struct attribute *qeth_dev_extended_attrs[] = {
&dev_attr_inbuf_size.attr,
&dev_attr_portno.attr,
&dev_attr_portname.attr,
&dev_attr_priority_queueing.attr,
&dev_attr_performance_stats.attr,
&dev_attr_layer2.attr,
&dev_attr_isolation.attr,
&dev_attr_hw_trap.attr,
&dev_attr_switch_attrs.attr,
NULL,
};
static const struct attribute_group qeth_dev_extended_group = {
.attrs = qeth_dev_extended_attrs,
};
static struct attribute *qeth_dev_attrs[] = {
&dev_attr_state.attr,
&dev_attr_chpid.attr,
&dev_attr_if_name.attr,
&dev_attr_card_type.attr,
&dev_attr_buffer_count.attr,
&dev_attr_recover.attr,
NULL,
};
static const struct attribute_group qeth_dev_group = {
.attrs = qeth_dev_attrs,
};
const struct attribute_group *qeth_dev_groups[] = {
&qeth_dev_group,
&qeth_dev_extended_group,
&qeth_dev_blkt_group,
NULL,
};